Been thinking about adding a quad-rail to your AR-15, but don't know how? Keep reading for five easy steps to changing a forearm.

First: Remove the upper receiver from the lower. You will need a way to hold the upper steady while you're working on it. This can most easily be done with the Receiver Claw.

Second: If you have the standard plastic handguards, you'll probably want to use a Forearm Removal Tool. This item is not necessarily required, but it can help save your fingers if you plan on removing the handguards frequently. Once the delta ring has been pulled down by using the forearm removal too, the plastic handguards will split into an upper and lower half, which can both be pulled right off.

Third: After removing the plastic handguards from your rifle or carbine, you can then install replacement handguards or two-piece quadrails. After installing those, you can simply follow the instructions up to this point in reverse for reassembly. If, however, you plan on installing a free-float handguard or quad-rails, keep reading. For an article explaining the difference between two-piece and free-float, click here.

Fourth: You will need to remove the muzzle brake/flash hider, then loosen and remove the front sight post and/or gas block and gas tube. You will then need to remove the delta ring assembly and barrel nut. One of the best tools to use for this is the AR Multi-Tool. When removing the front sight/gas block, you will probably need a punch set and a hammer.

Fifth: With all of the previously mentioned items removed, you can now install the new barrel nut, free-float tube or quad-rail, front sight/gas block, and flash hider/muzzle brake. Reassembly is the reverse order of disassembly.